Question

a) #include<iostream.h>
#define PI 3.14159
int main ()
{
float r = 2;
float circle;
circle = 2 + PI * I;
cout << circle;
return 0;
}​

Answer 1

Answer:

Error 'I' is undefined

if you wrote circle = 2+PI*r

It will print :

8.28318

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Answer 2

Answer:It will give error as 'I' is not defined

Explanation:

It will give error as 'I' is not defined

if you wrote circle = 2+PI*r

It will print :

8.28318